Still amazed at the number of folks that recommend Howard's Feed n Wax be used on Heritage speakers. The stuff is not a finish and is not a wax and will have to be removed if you plan on applying a new finish or repairing an existing finish on the speakers- especially important if trying to apply something like poly over it. Not looking for an argument with the Howard's adherents. It's not a finish. It's an oily shit-mess. The best advice here is @PrestonTom- find out what the factory finish is and go from there.